[Elecraft] KPA-1500 faulting on 6m; SWR issues

john at kk9a.com john at kk9a.com
Mon Jun 1 10:50:20 EDT 2020


I am not familiar with the KPA1500 but I am wondering if the tuner is  
causing the poor SWR on your good 6m antenna?  Is it bypassed?

John KK9A


Peter Dougherty w2irt wrote:


I have never driven the amp with 90 Watts. Ever. The 90W figure is  
what comes out of the K3s *after* the amp has tripped out. With the  
amp in 'operate' I feed it typically 25-35 Watts.

Here are the error codes, as requested (truncated for length--there  
are MANY more):
441 20-06-01T01:02:22 FLT 90 - PWR REFL  freq 50304 inp 13W fwd 1064W  
refl 198W swr 2.5 23A 32C adc 280 var 198
440 20-05-31T23:45:57 FLT 90 - PWR REFL  freq 50008 inp 22W fwd 1356W  
refl 199W swr 2.2 44A 45C adc 281 var 199
439 20-05-31T23:43:46 OVR 90 - PWR REFL  freq 50304 inp 23W fwd 1210W  
refl 172W swr 2.2 39A 31C adc 257 var 172
438 20-05-31T23:43:39 OVR 90 - PWR REFL  freq 50304 inp 23W fwd 1204W  
refl 172W swr 2.2 39A 28C adc 257 var 172
437 20-05-31T23:43:13 FLT 90 - PWR REFL  freq 50304 inp 23W fwd 1298W  
refl 202W swr 2.3 44A 27C adc 284 var 202
435 20-05-31T02:39:03 OVR 90 - PWR REFL  freq 50304 inp 14W fwd 1107W  
refl 178W swr 2.3 23A 47C adc 262 var 178
434 20-05-31T02:34:03 FLT 90 - PWR REFL  freq 50304 inp 15W fwd 1152W  
refl 198W swr 2.4 28A 33C adc 280 var 198
433 20-05-31T02:25:03 OVR 90 - PWR REFL  freq 50304 inp 15W fwd 1130W  
refl 187W swr 2.3 24A 43C adc 270 var 187
432 20-05-31T02:23:03 FLT 90 - PWR REFL  freq 50304 inp 18W fwd 1165W  
refl 199W swr 2.4 40A 43C adc 281 var 199
431 20-05-31T02:21:33 FLT 90 - PWR REFL  freq 50304 inp 20W fwd 1189W  
refl 201W swr 2.3 46A 48C adc 283 var 201




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